Nissan Xterra. Manual - part 391

EXL-52

< DTC/CIRCUIT DIAGNOSIS >

OFF-ROAD LAMP COVER SENSOR CIRCUIT

Does continuity exist?

YES

>> Replace fuse block (J/B).

NO

>> Repair the harness.

Off-road lamp cover assem-

bly

Fuse block (J/B)

Continuity

Connector

Terminal

Connector

Terminal

LH

B527

1

M4

2P

Yes

RH

B529

1

OFF-ROAD LAMPS CIRCUIT

EXL-53

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

OFF-ROAD LAMPS CIRCUIT

Description

INFOID:0000000009484904

The BCM controls the off-road lamps relay based on inputs from the combination switch (lighting and turn

signal switch), the off-road lamps switch and the off-road lamp cover sensors. When the off-road lamps relay is

energized, power flows from the off-road lamps relay to the off-road lamps assembly. 

Component Function Check

INFOID:0000000009484905

1.

CHECK OFF-ROAD LAMPS SWITCH OPERATION

Check that the indicator lamp on the off-road lamps switch illuminates from the off-road lamps switch, combi-

nation switch (lighting and turn signal switch) and off-road lamp cover sensor.
Is the inspection result normal?

YES

>> Off-road lamps switch function is OK.

NO

>> Inoperative from off-road lamp only, refer to 

EXL-53, "Diagnosis Procedure"

. 

Diagnosis Procedure

INFOID:0000000009484906

Regarding Wiring Diagram information, refer to 

EXL-106, "Wiring Diagram"

.

1.

CHECK OFF-ROAD LAMPS FUSE

1. Turn the ignition switch OFF.

2. Check that the following fuse is not open.

Is the fuse open?

YES

>> Replace the fuse after repairing the affected circuit.

NO

>> GO TO 2

2.

CHECK OFF-ROAD LAMPS VOLTAGE

1. Turn the ignition switch OFF.

2. Disconnect the off-road lamps assembly connectors.

3. Remove the off-road lamps covers.

4. Turn the ignition switch ON.

5. Turn the high beam headlamps ON.

6. Turn the off-road lamps ON.

7. Check the voltage between the off-road lamp assembly connectors and ground.

Is the inspection result normal?

YES

>> GO TO 3

Fixed ON>>GO TO 9

Fixed OFF>>GO TO 4

3.

CHECK OFF-ROAD LAMPS GROUND CIRCUIT

Unit

Location

Fuse No.

Capacity

Off road lamps assembly 

Fuse block (J/B)

9

15A

(+)

(

−)

Condition

Voltage

Connector

Terminal

LH

B528

4

Ground

Off-road lamps switch :ON

Battery voltage

RH

B530

4

Off-road lamps switch :OFF

0V

EXL-54

< DTC/CIRCUIT DIAGNOSIS >

OFF-ROAD LAMPS CIRCUIT

Check continuity between the off-road lamps assembly harness con-

nector and ground.

Is the inspection result normal?

YES

>> Inspect the off-road lamp bulb.

NO

>> Repair the harness.

4.

CHECK OFF-ROAD LAMPS RELAY

1. Turn the ignition switch OFF.

2. Disconnect the off-road lamps relay connector.

3. Check off-road lamps relay. Refer to 

EXL-55, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Replace off-road lamps relay.

5.

CHECK OFF-ROAD LAMPS RELAY POWER SUPPLY

1. Turn the ignition switch ON.

2. Check the voltage between the off-road lamps relay harness

connector and ground.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> GO TO 8

6.

CHECK OFF-ROAD LAMPS POWER SUPPLY CIRCUIT

1. Turn the ignition switch OFF.

2. Check continuity between the off-road lamps relay harness con-

nector (A) and off-road lamp assembly harness connectors (B).

Is inspection result normal?

YES

>> GO TO 7

NO

>> Repair harness or connector.

7.

CHECK OFF-ROAD LAMPS RELAY CONTROL CIRCUIT

1. Disconnect BCM connector M19.

Connector

Terminal

—

Continuity

LH

B528

5

Ground

Yes

RH

B530

5

AWLIA1708ZZ

(+)

(

−)

Voltage

Connector

Terminal

M81

2

Ground

Battery voltage

3

AWLIA1709ZZ

A

B

Continuity

Connector

Terminal

Connector

Terminal

M81

5

LH

B528

4

Yes

RH

B530

4

AWLIA1710ZZ

OFF-ROAD LAMPS CIRCUIT

EXL-55

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

J

K

M

A

B

EXL

N

O

P

2. Check continuity between the off-road lamps relay harness con-

nector (A) and BCM harness connectors (B).

Is inspection result normal?

YES

>> Replace BCM. Refer to 

BCS-50, "Removal and Installa-

tion"

.

NO

>> Inspect harness or connectors.

8.

CHECK OFF-ROAD LAMPS RELAY POWER SUPPLY CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect fuse block (J/B) connector M3.

3. Check continuity between the off-road lamps relay harness connector and fuse block (J/B) harness con-

nectors.

Does continuity exist?

YES

>> Replace fuse block (J/B).

NO

>> Repair the harness or connectors.

9.

CHECK OFF-ROAD LAMPS RELAY FOR SHORT CIRCUIT

1. Turn the ignition switch OFF.

2. Disconnect the off-road lamps relay connectors.

3. Check continuity between the off-road lamps relay harness connector and ground.

Does continuity exist?

YES

>> Repair the harness or connectors.

NO

>> Replace BCM. Refer to 

BCS-50, "Removal and Installation"

.

Component Inspection

INFOID:0000000009484907

1.

 CHECK OFF-ROAD LAMPS RELAY

Check off-road lamps relay.

Is the inspection result normal?

YES

>> Inspection End.

NO

>> Replace off-road lamps relay.

A

A

Continuity

Connector

Terminal

Connector

Terminal

M81

1

M19

50

Yes

AWLIA1711ZZ

Off-road lamps relay

Fuse block (J/B)

Continuity

Connector

Terminal

Connector

Terminal

M81

2

M3

2N

Yes

3

Connector

Terminal

—

Continuity

M81

1

Ground

No

Terminal

Condition

Continuity

Off-road lamps relay

3

5

12V direct current supply between termi-
nals 1 and 2.

Yes

No current supply

No

SEF497Y